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When would you feed a subpanel

Posted by deecee on March 4th, 2003 06:00 PM
In reply to Do Not Bond Neutral To Ground At Subpanel.... by Dodgeman on March 4th, 2003 10:56 AM [Go to top of thread]

with just three wires? Guess I should have expounded on this. If you have a garage, barn, shed etc that has no other metal connections (phone lines, water, gas etc) you could connect with three wire feed and subpanel would be treated as a main panel although fed from your main. In this instance, you would bond neutral in the sub to ground with its own grounding system. Earth ground impedance, gradience factors and multiple locations of supply system grounds make the parallel path of ground of no consequence. have a similar path like we're talking about here between your main and your supply transformer where ground and neutral are bonded on both ends, yes? The worms should be okay unless you placed the grounds really close...which is why the rules on ground rod spacing. Luck, Kizmet

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